It isn't shown in any of the episodes but in one of the OVAs
It never actually shows him make the grave but in episode 79 they explain why he made it. Its also the last time they ever mention her grave in the series.
It's traditional show of respect to leave a stone or a coin to show that a grave site has been visited. Hope this answered your question
Episode 14
It's in the episode 'Mordecai and Rigby: ringtoneers'.
the power
It never actually shows him make the grave but in episode 79 they explain why he made it. Its also the last time they ever mention her grave in the series.
"The Grave" was the seventh episode in season three . (Number seventy-two in the series .)
Mona Vanderwaal dies in the episode titled "Taking This One to the Grave," which is the twelfth episode of the fifth season of the TV show "Pretty Little Liars."
Season 5 episode 116 Grave Danger (pt1) originally aired on May 19, 2005 Season 5 episode 117 Grave Danger (pt 2)
grave danger
Nothing. By default, ls will not show configuration files or directories that begin with a . These can be displayed by passing the -a parameter to ls. Ex. ls -a
Grave Yard Shift
Bass was in another episode before the episode called The Virusbeast. But he officially appeared in the episode The Virusbeast or Grave (Either one of the episodes).
the command is - ls there are other options and flags for the ls command which can be viewed by typing man ls if you type 'man ls' in a google search, it will show you the same manual
The episode where his nemesis Jordan Boulton is brought back from the grave and kisses Heath Herring's neck.
laurel
You burn his grave